Cited by 217Selenium in Biological SystemsPlant Micronutrient Interactions and EffectsNitrogen and Sulfur Effects on Brassica

Seasonal fluctuations of selenium and sulfur accumulation in selenium hyperaccumulators and related nonaccumulators

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Galeas, Miriam L., Zhang, Li Hong, Freeman, John L., Wegner, Mellissa, Pilon‐Smits, Elizabeth A. H.·2007·New Phytologist

Abstract

Some plants hyperaccumulate selenium (Se) up to 1% of dry weight. This study was performed to obtain insight into whole-plant Se fluxes in hyperaccumulators. Selenium hyperaccumulators Astragalus bisulcatus and Stanleya pinnata were monitored over two growing seasons for seasonal fluctuations in concentrations of Se and the chemically similar element sulfur (S). The related nonhyperaccumulators Astragalus sericoleucus, Oxytropis sericea and Thlaspi montanum were included for comparison. In both hyperaccumulators leaf Se decreased from April to October, coinciding with Se hyperaccumulation in flowers and seeds. Root Se levels were lowest in summer. Selenium concentration decreased with leaf age in both hyperaccumulators. Leaf S levels peaked in summer in all plant species, as did Se levels in nonhyperaccumulators. Selenium and S levels tended to be negatively correlated in hyperaccumulators, and positively correlated in nonhyperaccumulators. These results suggest a specific flow of Se in hyperaccumulator plants over the growing season, from root to young leaves in spring, followed by remobilization from aging leaves to reproductive tissues in summer, and back to roots in the autumn.

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Crossref · 10.1111/j.1469-8137.2006.01943.x

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  • In the fall, part of the sequestered Se is deposited on the soil surface as litter, and some is remobilized to the root.

    “In the fall, part of the sequestered Se is deposited on the soil surface as litter, and some is remobilized to the root [229].”

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Authors
Galeas, M. L., Zhang, L. H., Freeman, J. L., Wegner, M., & Pilon‐Smits, E. A. H.
Affiliations
Colorado State University (US)
Corresponding author
Pilon‐Smits, Elizabeth A. H.
Venue
New Phytologist
Publisher
Wiley
Published
2006-11-17
Volume
173
Issue
3
Pages
517-525
ISSN
  • 0028-646X (ISSN-L)
  • 1469-8137
OpenAlex
W2096449002
Cited by
217
References
46
Citations by year
2026: 5 · 2025: 9 · 2024: 9 · 2023: 13 · 2022: 17 · 2021: 10 · 2020: 21 · 2019: 13 · 2018: 12 · 2017: 14 · 2016: 7 · 2015: 16 · 2014: 11 · 2013: 8 · 2012: 14
FWCI
3.81
Type
journal article
Language
en
Open access
Locations
  • New Phytologist (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Science Foundation (0444471)
Topics
  • Health Sciences › Nursing › Nutrition and Dietetics › Selenium in Biological Systems
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant Micronutrient Interactions and Effects
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Nitrogen and Sulfur Effects on Brassica
Keywords
selenium hyperaccumulation, seasonal variation, selenium accumulation, sulfur accumulation, leaf age, root-to-shoot translocation, Astragalus bisulcatus, Stanleya pinnata, Oxytropis sericea, Thlaspi montanum
MeSH terms
Models, Biological, Seasons, Selenium, Soil, Sulfur, Plant Leaves, Astragalus Plant, Thlaspi, Oxytropis

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